DevOps – Page 5 – ITFROMZERO

Ansible Vault: Encrypting Secrets in Playbooks and Storing Them Safely in Git

By admin September 4, 2026

Hardcoding secrets in your Ansible Playbook and committing them to Git is the fastest way to lose a server. This article compares 4 approaches to managing secrets in Ansible — from env vars to HashiCorp Vault — and walks through implementing Ansible Vault step by step: the built-in, free solution that's secure enough for most teams.

Ubuntu

Juju and Charmed Operators on Ubuntu: Automating Deployment and Application Lifecycle Management with a Model-Driven Approach

By admin September 3, 2026

Juju and Charmed Operators are Canonical's orchestration toolkit for deploying and managing the full lifecycle of complex applications using a Model-driven approach on Ubuntu. Instead of writing manual scripts for each service, Juju automatically handles the relationships between services as the topology changes — scaling, upgrading, and backups are all managed through a single unified interface.

MySQL

Manage MySQL Like a Pro: Boost Performance 200% with the mycli and mytop Duo

By admin September 3, 2026

Speed up MySQL administration with mycli and mytop. A detailed guide on installation, smart autocomplete, and real-time database performance monitoring directly in your terminal.

Git

Repository Rescue: Mastering git fsck to Recover Code and Fix Data Errors

By admin September 2, 2026

A detailed guide on using git fsck to check data integrity, find deleted commits, and handle Corrupt Object errors in real-world Git scenarios.

Docker

Configuring Docker daemon.json: Prevent Disk Full Errors and Production Server Crashes

By admin September 2, 2026

Don't let Docker swallow your hard drive. A detailed guide on configuring daemon.json to optimize storage, limit logs, and increase uptime for production servers.

MySQL

mysqlslap: How I “Torture” MySQL to Find Real-World Load Limits

By admin September 2, 2026

Don't wait for a crash to optimize. Learn how to use mysqlslap to simulate hundreds of users, test MySQL load limits, and optimize indexes based on real-world data.

Fedora

Deploying GitLab CE on Fedora Server: Building Your Own Internal Source Control and CI/CD Platform with SELinux and firewalld

By admin September 1, 2026

Six months running GitLab CE in production on Fedora Server — here's what I learned. SELinux doesn't need to be disabled, just configured correctly. Detailed guides covering firewalld, gitlab.rb, automated backups, and Prometheus/Grafana monitoring included. Everything you need to build your own internal DevOps platform without relying on the cloud.

Git

Mastering Jujutsu (jj): A Safer and Smarter Version Control System than Git

By admin September 1, 2026

Jujutsu (jj) is a next-generation Git-compatible version control system that eliminates the staging area, supports an Operations Log for easy undos, and handles conflicts flexibly.

Monitoring

Celery Worker Monitoring: From ‘Flying Blind’ to Total Control with Flower and Prometheus

By admin September 1, 2026

Don't let Celery Workers become a 'black box'. A detailed guide on combining Flower, Prometheus, and Grafana to monitor tasks, detect queue bottlenecks, and automate alerts.

Monitoring

Building a Custom Prometheus Exporter with Python: Comprehensive Internal API Monitoring

By admin August 31, 2026

Is your system down even though the dashboard is green? Learn how to build a Custom Prometheus Exporter with Python to professionally monitor internal APIs and business logic.